No, I haven't yet done module programming as I just started. Ima trying to run the KMeans classifier in the associate tab folder. Do you know if it works ? Here is the callback message that is returned.

Probably a defect/bug in the version you have. You can try downloading orange anew: http://www.ailab.si/orange/downloads.aspIt was updated yesterday! This is what I have and K-means works there. (Trying it on the iris data set, it gets the classification quite right!)